./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1871507476 <...> Warning: Permanently added '10.128.10.32' (ED25519) to the list of known hosts. execve("./syz-executor1871507476", ["./syz-executor1871507476"], 0x7fffa71048d0 /* 10 vars */) = 0 brk(NULL) = 0x55558ea4c000 brk(0x55558ea4cd00) = 0x55558ea4cd00 arch_prctl(ARCH_SET_FS, 0x55558ea4c380) = 0 set_tid_address(0x55558ea4c650) = 5840 set_robust_list(0x55558ea4c660, 24) = 0 rseq(0x55558ea4cca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1871507476", 4096) = 28 getrandom("\xcd\xf4\xf1\x1d\xdb\xc7\xc0\x3e", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55558ea4cd00 brk(0x55558ea6dd00) = 0x55558ea6dd00 brk(0x55558ea6e000) = 0x55558ea6e000 mprotect(0x7ff5762b7000, 16384, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5842 attached , child_tidptr=0x55558ea4c650) = 5842 [pid 5842] set_robust_list(0x55558ea4c660, 24) = 0 [pid 5842] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5842] setpgid(0, 0) = 0 [pid 5842] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5842] write(3, "1000", 4) = 4 [pid 5842] close(3) = 0 [pid 5842] write(1, "executing program\n", 18executing program ) = 18 [pid 5842] memfd_create("syzkaller", 0) = 3 [pid 5842] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ff56dc00000 [pid 5842] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 16777216) = 16777216 [pid 5842] munmap(0x7ff56dc00000, 138412032) = 0 [pid 5842] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5842] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5842] close(3) = 0 [pid 5842] close(4) = 0 [pid 5842] mkdir("./file1", 0777) = 0 [ 87.334312][ T5842] loop0: detected capacity change from 0 to 32768 [ 87.424194][ T5842] bcachefs (loop0): starting version 1.7: mi_btree_bitmap opts=metadata_checksum=none,data_checksum=none,compression=gzip,erasure_code,norecovery,nojournal_transaction_names,reconstruct_alloc,nocow [ 87.424194][ T5842] allowing incompatible features above 0.0: (unknown version) [ 87.424194][ T5842] features: lz4,new_siphash,inline_data,new_extent_overwrite,btree_ptr_v2,new_varint,journal_no_flush,alloc_v2,extents_across_btree_nodes [ 87.465561][ T5842] bcachefs (loop0): Using encoding defined by superblock: utf8-12.1.0 [ 87.474930][ T5842] bcachefs (loop0): recovering from clean shutdown, journal seq 10 [ 87.483386][ T5842] bcachefs (loop0): Version upgrade required: [ 87.483386][ T5842] Version upgrade from 0.24: unwritten_extents to 1.7: mi_btree_bitmap incomplete [ 87.483386][ T5842] Doing incompatible version upgrade from 0.24: unwritten_extents to 1.28: inode_has_case_insensitive [ 87.483386][ T5842] running recovery passes: check_allocations,check_alloc_info,check_lrus,check_btree_backpointers,check_backpointers_to_extents,check_extents_to_backpointers,check_alloc_to_lru_refs,bucket_gens_init,check_snapshot_trees,check_snapshots,check_subvols,check_subvol_children,delete_dead_snapshots,check_inodes,check_extents,check_indirect_extents,check_dirents,check_xattrs,check_root,check_unreachable_inodes,check_subvolume_structure,check_directory_structure,check_nlinks,check_rebalance_work,set_fs_needs_rebalance [ 87.557536][ T5842] bcachefs (loop0): dropping and reconstructing all alloc info [ 87.576144][ T5842] bcachefs (loop0): btree node read error at btree dirents level 0/0 [ 87.576169][ T5842] u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 281474976710656: seq 9aa2895aefce4bdf written 24 min_key POS_MIN durability: 1 ptr: 0:41:0 gen 0 [ 87.576179][ T5842] loop0 node offset 0/24: incorrect min_key: got 0:0:7 should be POS_MIN [ 87.576186][ T5842] flagging btree dirents lost data [ 87.576192][ T5842] running recovery pass scan_for_btree_nodes (1), currently at recovery_pass_empty (0) [ 87.576200][ T5842] ret btree_node_read_validate_error [ 87.629396][ T5842] bcachefs (loop0): error reading btree root btree=dirents level=0: btree_node_read_error, fixing [ 87.643909][ T5842] bcachefs (loop0): scan_for_btree_nodes... [ 87.661914][ T5842] bcachefs (loop0): btree node scan found 7 nodes after overwrites [ 87.676151][ T5842] done [ 87.678996][ T5842] bcachefs (loop0): check_topology... [ 87.679385][ T5842] bcachefs (loop0): btree root dirents unreadable, must recover from scan [ 87.693775][ T5842] bcachefs (loop0): bch2_get_scanned_nodes(): recovery btree=dirents level=0 POS_MIN - SPOS_MAX [ 87.704494][ T5842] bcachefs (loop0): bch2_get_scanned_nodes(): recovering u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 9aa2895aefce4bdf written 24 min_key 0:0:7 durability: 1 ptr: 0:41:0 gen 0 [ 87.724696][ T5842] bcachefs (loop0): bch2_get_scanned_nodes(): recovery btree=dirents level=0 POS_MIN - 0:0:6 [ 87.735614][ T5842] bcachefs (loop0): error in recovery: ENOMEMemergency read only at seq 10 [ 87.744298][ T5842] bcachefs (loop0): bch2_fs_start(): error starting filesystem ENOMEM [ 87.752588][ T5842] bcachefs (loop0): shutting down [ 87.769834][ T5842] bcachefs (loop0): shutdown complete [ 88.408748][ T5842] bcachefs: bch2_fs_get_tree() error: ENOMEM [ 88.414794][ T5842] Filesystem bcachefs get_tree() didn't set fc->root, returned 12 [ 88.422982][ T5842] ------------[ cut here ]------------ [ 88.428507][ T5842] kernel BUG at fs/super.c:1812! [ 88.433526][ T5842] Oops: invalid opcode: 0000 [#1] SMP KASAN PTI [ 88.439799][ T5842] CPU: 0 UID: 0 PID: 5842 Comm: syz-executor187 Not tainted 6.15.0-next-20250604-syzkaller #0 PREEMPT(full) [ 88.451347][ T5842] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 88.461401][ T5842] RIP: 0010:vfs_get_tree+0x29f/0x2b0 [ 88.466710][ T5842] Code: 1b 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 14 8b ee ff 48 8b 33 48 c7 c7 00 31 99 8b 44 89 f2 e8 d2 42 f2 fe 90 <0f> 0b 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 [ 88.486319][ T5842] RSP: 0018:ffffc9000437fd58 EFLAGS: 00010246 [ 88.492386][ T5842] RAX: 000000000000003f RBX: ffffffff8e7829a0 RCX: ad6f5de195933e00 [ 88.500361][ T5842] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 88.508331][ T5842] RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004 [ 88.516305][ T5842] R10: dffffc0000000000 R11: fffffbfff1bfa9ec R12: 1ffff1100ea3c216 [ 88.524293][ T5842] R13: dffffc0000000000 R14: 000000000000000c R15: 0000000000000000 [ 88.532267][ T5842] FS: 000055558ea4c380(0000) GS:ffff888125c4d000(0000) knlGS:0000000000000000 [ 88.541195][ T5842] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 88.547780][ T5842] CR2: 00005620027d9f60 CR3: 0000000075234000 CR4: 00000000003526f0 [ 88.555759][ T5842] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 88.563763][ T5842] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 88.571739][ T5842] Call Trace: [ 88.575023][ T5842] [ 88.577961][ T5842] do_new_mount+0x24a/0xa40 [ 88.582471][ T5842] __se_sys_mount+0x317/0x410 [ 88.587149][ T5842] ? __pfx___se_sys_mount+0x10/0x10 [ 88.592341][ T5842] ? rcu_is_watching+0x15/0xb0 [ 88.597117][ T5842] ? __x64_sys_mount+0x20/0xc0 [ 88.601883][ T5842] do_syscall_64+0xfa/0x3b0 [ 88.606402][ T5842] ? lockdep_hardirqs_on+0x9c/0x150 [ 88.611601][ T5842] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 88.617670][ T5842] ? clear_bhb_loop+0x60/0xb0 [ 88.622357][ T5842] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 88.628255][ T5842] RIP: 0033:0x7ff57623fe2a [ 88.632680][ T5842] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 88.652289][ T5842] RSP: 002b:00007ffda26af7f8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 88.660702][ T5842] RAX: ffffffffffffffda RBX: 00007ffda26af810 RCX: 00007ff57623fe2a [ 88.668678][ T5842] RDX: 00002000000000c0 RSI: 0000200000000000 RDI: 00007ffda26af810 [ 88.676669][ T5842] RBP: 0000200000000000 R08: 00007ffda26af850 R09: 0000000000005972 [ 88.684650][ T5842] R10: 0000000000800000 R11: 0000000000000282 R12: 00002000000000c0 [ 88.692629][ T5842] R13: 00007ffda26af850 R14: 0000000000000003 R15: 0000000000800000 [ 88.700605][ T5842] [ 88.703620][ T5842] Modules linked in: [ 88.707849][ T5842] ---[ end trace 0000000000000000 ]--- [ 88.713522][ T5842] RIP: 0010:vfs_get_tree+0x29f/0x2b0 [ 88.719054][ T5842] Code: 1b 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 14 8b ee ff 48 8b 33 48 c7 c7 00 31 99 8b 44 89 f2 e8 d2 42 f2 fe 90 <0f> 0b 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 [ 88.738775][ T5842] RSP: 0018:ffffc9000437fd58 EFLAGS: 00010246 [ 88.745069][ T5842] RAX: 000000000000003f RBX: ffffffff8e7829a0 RCX: ad6f5de195933e00 [ 88.753444][ T5842] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 88.762057][ T5842] RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004 [ 88.770705][ T5842] R10: dffffc0000000000 R11: fffffbfff1bfa9ec R12: 1ffff1100ea3c216 [ 88.778813][ T5842] R13: dffffc0000000000 R14: 000000000000000c R15: 0000000000000000 [ 88.786841][ T5842] FS: 000055558ea4c380(0000) GS:ffff888125c4d000(0000) knlGS:0000000000000000 [ 88.795816][ T5842] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 88.802677][ T5842] CR2: 00007ffe40667f19 CR3: 0000000075234000 CR4: 00000000003526f0 [ 88.810722][ T5842] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 88.818758][ T5842] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 88.826760][ T5842] Kernel panic - not syncing: Fatal exception [ 88.833123][ T5842] Kernel Offset: disabled [ 88.837450][ T5842] Rebooting in 86400 seconds..